# How could you determine the point in time a Radar antenna is directly facing a stationary RF receiver station?

I am currently doing experiments involving Software Defined Radio and Radar systems. Since I am new in this field and currently try to refresh my physics/math skills, I encountered some problems along the way.

However, I am rather confused on how to measure signal strength. Since I don't have access to a real radar system, I tried to implement one via Software-Defined Radio. The signal is generated by sending pulsed waves and to simulate a rotation of the antenna the amplitude increases for each pulse. There is one pulse with the peak amplitude in the middle. Afterwards the amplitude for each peak is declining. I am not sure if this is even remotely correct.

My question is whether it is possible to measure the time the radar antenna is directly facing towards the RF receiver and whether there are methods that can help me there.

• Consider using a detector chip like e.g. AD8319. It is a signal strength meter.
– Jens
Commented Jun 13, 2022 at 19:51
• Also consider the radar antenna directionality; if it is outputting 90% of it's power in a 10 degree cone, then what you'll "see" is much less signal most of the time, and a very high peak when within that 10 degrees. Commented Jun 13, 2022 at 20:08
• how accurate does the time have to be? Commented Jun 13, 2022 at 22:21
• when the received signal is the strongest, the antenna is no longer pointing directly at the receiver Commented Jun 13, 2022 at 23:24
• Why are you using a pulsed signal? Why not just continuously vary your simulated radar signal up and down, and write some software to detect to maximum. Commented Jun 13, 2022 at 23:45